Maths Corner

A selection of my math related records. My style and depth varies extremely over the years both in math and writing skills. The list below is incomplete as I try to keep precisely written and mathematically correct stuffs here only, but this is such a high bar for my older works. Please search by tag if you want a full list.

Sorry if you clicked open something from the distant past and felt like silly. Most equations should be displayed with Javascript, but some used latexcogs inscribed pictures which could be blocked by ad blockers.

Interests:
Analysis - spectral, harmonic, PDEs.
Optimization - NP-completeness, approximation algorithms
Tournaments - IMO, Putnam, Simon Marais.

Last updated: 13/8/2025

2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
A geometric approach to LP duality (check my site)
Duality method for approximation algorithms (check my site)
2015
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